#include <bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>
#define all(v) v.begin(), v.end()
#define pb push_back
#define ss second
#define ff first
#define vt vector
using namespace std;
//using namespace __gnu_pbds;
typedef long long ll;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef pair<double, int> pdi;
const int inf = 1e9 + 10000;
const int mod = 1e9+7;
const int maxn = 4e3 + 12;
char a[maxn][maxn];
bool was[maxn][maxn];
queue<pair<pii, int>> q;
void go(int x, int y, int s){
q.push({{x, y}, s});
was[x][y] = 1;
if(!was[x - 1][y] && a[x][y] == a[x - 1][y])go(x - 1, y, s);
if(!was[x + 1][y] && a[x][y] == a[x + 1][y])go(x + 1, y, s);
if(!was[x][y - 1] && a[x][y] == a[x][y - 1])go(x, y - 1, s);
if(!was[x][y + 1] && a[x][y] == a[x][y + 1])go(x, y + 1, s);
}
void solve() {
int n, m;
cin >> n >> m;
for(int i = 1; i <= n; i++){
was[i][0] = was[i][m + 1] = 1;
for(int j = 1; j <= m; j++){
cin >> a[i][j];
if(a[i][j] == '.')was[i][j] = 1;
}
}
for(int i = 1; i <= m; i++)was[0][i] = was[n + 1][i] = 1;
int ans = 0;
go(n, m, 1);
while(!q.empty()){
pair<pii, int> nw = q.front();
q.pop();
int x = nw.ff.ff, y = nw.ff.ss, s = nw.ss;
ans = max(ans, s);
if(!was[x - 1][y] && a[x][y] != a[x - 1][y])go(x - 1, y, s + 1);
if(!was[x + 1][y] && a[x][y] != a[x + 1][y])go(x + 1, y, s + 1);
if(!was[x][y - 1] && a[x][y] != a[x][y - 1])go(x, y - 1, s + 1);
if(!was[x][y + 1] && a[x][y] != a[x][y + 1])go(x, y + 1, s + 1);
}
cout << ans;
}
int main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
int times = 1;
//cin >> times;
for(int i = 1; i <= times; i++) {
solve();
}
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
10 ms |
7256 KB |
Output is correct |
| 2 |
Correct |
1 ms |
2392 KB |
Output is correct |
| 3 |
Correct |
1 ms |
4700 KB |
Output is correct |
| 4 |
Correct |
7 ms |
9092 KB |
Output is correct |
| 5 |
Correct |
3 ms |
6748 KB |
Output is correct |
| 6 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 7 |
Correct |
1 ms |
4700 KB |
Output is correct |
| 8 |
Correct |
2 ms |
4700 KB |
Output is correct |
| 9 |
Correct |
1 ms |
4700 KB |
Output is correct |
| 10 |
Correct |
3 ms |
6748 KB |
Output is correct |
| 11 |
Correct |
2 ms |
5468 KB |
Output is correct |
| 12 |
Correct |
4 ms |
7004 KB |
Output is correct |
| 13 |
Correct |
3 ms |
6744 KB |
Output is correct |
| 14 |
Correct |
3 ms |
6748 KB |
Output is correct |
| 15 |
Correct |
8 ms |
7000 KB |
Output is correct |
| 16 |
Correct |
10 ms |
7196 KB |
Output is correct |
| 17 |
Correct |
7 ms |
7004 KB |
Output is correct |
| 18 |
Correct |
7 ms |
9048 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
6 ms |
31836 KB |
Output is correct |
| 2 |
Correct |
33 ms |
14328 KB |
Output is correct |
| 3 |
Correct |
239 ms |
41384 KB |
Output is correct |
| 4 |
Correct |
65 ms |
21652 KB |
Output is correct |
| 5 |
Correct |
124 ms |
32568 KB |
Output is correct |
| 6 |
Correct |
664 ms |
187028 KB |
Output is correct |
| 7 |
Correct |
7 ms |
32344 KB |
Output is correct |
| 8 |
Correct |
6 ms |
31832 KB |
Output is correct |
| 9 |
Correct |
2 ms |
3160 KB |
Output is correct |
| 10 |
Correct |
2 ms |
2904 KB |
Output is correct |
| 11 |
Correct |
7 ms |
32088 KB |
Output is correct |
| 12 |
Correct |
2 ms |
4700 KB |
Output is correct |
| 13 |
Correct |
31 ms |
14460 KB |
Output is correct |
| 14 |
Correct |
19 ms |
11608 KB |
Output is correct |
| 15 |
Correct |
18 ms |
11752 KB |
Output is correct |
| 16 |
Correct |
15 ms |
7724 KB |
Output is correct |
| 17 |
Correct |
81 ms |
21952 KB |
Output is correct |
| 18 |
Correct |
69 ms |
21584 KB |
Output is correct |
| 19 |
Correct |
61 ms |
21584 KB |
Output is correct |
| 20 |
Correct |
52 ms |
19540 KB |
Output is correct |
| 21 |
Correct |
136 ms |
32916 KB |
Output is correct |
| 22 |
Correct |
125 ms |
32592 KB |
Output is correct |
| 23 |
Correct |
145 ms |
28268 KB |
Output is correct |
| 24 |
Correct |
127 ms |
32824 KB |
Output is correct |
| 25 |
Correct |
291 ms |
41448 KB |
Output is correct |
| 26 |
Runtime error |
708 ms |
1048576 KB |
Execution killed with signal 9 |
| 27 |
Correct |
797 ms |
488436 KB |
Output is correct |
| 28 |
Correct |
647 ms |
178584 KB |
Output is correct |
| 29 |
Correct |
633 ms |
166592 KB |
Output is correct |
| 30 |
Correct |
646 ms |
272020 KB |
Output is correct |
| 31 |
Correct |
353 ms |
31828 KB |
Output is correct |
| 32 |
Correct |
841 ms |
582116 KB |
Output is correct |
